How is a railroad crossbuck different from the round warning sign?

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  1. 1. What location is identified by this crossbuck?Two white boards forming an X and reading RAILROAD CROSSING.
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  1. What location is identified by this crossbuck?

    Correct answer: A railroad crossing.

    The crossbuck is at the railroad crossing. Its presence does not show whether a train is approaching; observe all crossing controls and rail traffic.

    Source: Alaska Driver Manual, Rev. 10/2025; Railroad Crossings: crossbuck and advance warning; printed page 58, physical PDF page 63. Meaning and illustration context checked September 28, 2026. ↗

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Question reference: ak-sign-041

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Practice question from our Alaska study set. Any state-specific rules in its feedback apply to Alaska; check your own state handbook for local requirements.

The answer, explained

The white X-shaped crossbuck identifies the railroad crossing itself. The round yellow railroad sign gives advance warning before you reach the tracks.

Read the crossbuck together with any STOP or YIELD sign, flashing lights, gates, and the actual train traffic. A crossbuck does not report whether a train is coming, so its presence is never proof that the tracks are clear.

A common mistake

Mistaking the crossbuck for advance notice farther from the tracks can make you recognize the crossing too late.